Mesostoma ehrenbergii (Focke, 1836) | 1929 or earlier | | | |
Bothromesostoma primitivum Sabussowa, 1929 | 1929 or earlier | | | from various ponds, lakes and streams. |
Sorocelis relicta Sabussowa, 1929 | 1929 or earlier | | | from various ponds, lakes and streams. |
Bdellocephala kamtschatica Zabusova, 1929 | 1929 or earlier | | | from various ponds, lakes and streams. |
Bdellocephala mediobuccalis Zabusova, 1929 | 1929 or earlier | | | from various ponds, lakes and streams. |
Sorocelis eudendrocoeloides Sabussowa, 1929 | 1929 or earlier | | | from various ponds, lakes and streams. |
Sorocelis elongata Sabussowa, 1929 | 1929 or earlier | | | from various ponds, lakes and streams. |
Polycelis schmidti (Zabusov, 1916) | 1916 or earlier | | | Northeast Siberia and Kamchatka. |
Mesostoma ehrenbergii (Focke, 1836) | 1929 or earlier | | | |